In the People's Republic of China, a public security bureau (PSB) (Chinese: 公安局; pinyin: Gōng'ānjú) refers to the government offices (essentially acting as a Police stations) while the smaller offices are called Police posts (Chinese: 派出所; pinyin: Pai'chūsuǒ) which are similar in concept to the Japanese Kōban system) present in each province and municipality that handles policing (law enforcement), public security, and social order, the other duties of such offices include residence registration as well as immigration and travel affairs of foreigners.
Most major Chinese cities will have a PSB assigned to deal with local security needs. Additionally, all the provinces and special regions (excluding the Special administrative regions) have PSB to deal with provincial security issues. The only places in People's Republic of China without a public security bureau are in the Special administrative regions of Hong Kong and Macau, which have their own security/police forces.